/*
 * Copyright (c) 2007 Aleksey Nikiforov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'Aleksey Nikiforov' nor the names of other contributors 
 *   may be used to endorse or promote products derived from this software 
 *   without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package org.lex.input;




import com.jme.math.Vector2f;
import com.jme.math.Vector3f;
import com.jme.renderer.Camera;

public class ScrollingPlane extends GeometricPlane {

	private Camera camera;
	
	/** temp vector */
	private Vector2f delta = new Vector2f();
	
	public ScrollingPlane(Camera camera) {
		super();
		this.camera = camera;
	}
	
	/**
	 * xVec and yVec can be any two orthonormal vectors.
	 * (These vectors have to be normalized and orthogonal to each other).
	 * 
	 * These vectors will define a scrolling plane, and the camera orientation
	 * will define the scrolling direction.
	 * 
	 * The up vector is required to define the height offset via setHeight().
	 * The height offset will affect the worldTranslation of the point on
	 * the scrolling plane.
	 * 
	 * @param xVec
	 * @param yVec
	 * @param up is needed to define the height offset
	 * @param camera
	 */
	public ScrollingPlane(Camera camera,
			Vector3f xVec, Vector3f yVec, Vector3f up)
	{
		super(xVec, yVec, up);
		this.camera = camera;
	}
	
	public void scrollUp(float distance) {
		Vector3f direction = camera.getDirection();
		delta.x = xVector.dot(direction);
		delta.y = yVector.dot(direction);
		delta.normalizeLocal();
		delta.multLocal(distance);
		
		location.addLocal(delta);
		updateWorldTranslation();
	}
	
	public void scrollRight(float distance) {
		Vector3f direction = camera.getLeft();
		delta.x = -1*xVector.dot(direction);
		delta.y = -1*yVector.dot(direction);
		delta.normalizeLocal();
		delta.multLocal(distance);

		location.addLocal(delta);
		updateWorldTranslation();
	}
	
	/**
	 * @return camera
	 */
	public Camera getCamera() {
		return camera;
	}
	
	public void setCamera(Camera camera) {
		this.camera = camera;
	}
	
}
